NSO Level 1- Science Olympiad (SOF) Class 8: Questions 470 - 474 of 1076
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Question number: 470
Question
Copper is used to make electric wires. Which property of metals is used here?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Conductivity | |
b. | Ductility | |
c. | Malleability | |
d. | Both a. and b. are correct | |
Question number: 471
» Synthetic Fibres and Plastics
Question
The uses of some materials are given in the statement. Identify them
The source of plastic is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Wood pulp | |
b. | Rubber | |
c. | Plant gum | |
d. | Petroleum | |
Question number: 472
Question
The chemical reaction taking place in rust formation is
Choices
| Choice (4) | Response | |
|---|---|---|
a. |
| |
b. |
| |
c. |
| |
d. | Fe + → | |
Question number: 473
» Synthetic Fibres and Plastics
Question
Bakelite is used to make switch boards. The property helping this is
Choices
| Choice (4) | Response | |
|---|---|---|
a. | It can resist heat and can tolerate higher temperature than plastic. | |
b. | It gets deformed easily. | |
c. | It is a poor conductor of electricity | |
d. | It can be bend easily | |
Question number: 474
» Synthetic Fibres and Plastics
Question
Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.
A blend of polyster/cotton
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Cotton wringles but the blended fabric does not wringle. | |
b. | Cotton is not much durable but the blended fabric is more durable. | |
c. | Polyster is not comfortable to wear but the blended fabric is more comfortable to wear. | |
d. | All a. , b. and c. are correct | |